Metal roof flashing repairs & Replacement

Roof flashing is sheet metal formed and fitted at every junction on the roof where water would otherwise find a way in. This includes where the roof meets walls (apron and stepped flashings), where two roof planes meet at valleys and hips (valley and hip flashings), at the roof edges (barge capping), at the roof apex (ridge capping), and wherever any element passes through the roof surface such as skylights, vents, solar panel mounts, and pipes (penetration flashings). Flashing intercepts water at these vulnerable points and directs it back into the roof drainage path.

Yes, and this is very common. The roof sheets themselves can be in excellent condition while a failed flashing at a wall junction, valley, or penetration allows water to enter. Flashing failures are responsible for a significant proportion of the roof leaks we investigate and repair. In many cases, a homeowner has had the roof inspected from the ground or from inside the ceiling without finding the source because the failure is at a junction that only becomes visible on the roof surface with a close inspection.

Yes. We carry out flashing repairs and replacement across all common metal roofing profiles used in Queensland including Colorbond, Zincalume, Klip-Lok, Trimdek, and corrugated iron. The flashing materials and methods we use are appropriate for the profile and the substrate. Where new flashings need to be fabricated, we use compatible metals to avoid galvanic corrosion at the junction.

It depends on the condition of the flashing metal itself. If the flashing is correctly formed, correctly installed, and structurally sound, a failed sealant bead can be stripped back and replaced to restore the watertight seal. If the flashing metal is corroded, if the original installation is inadequate, or if the same junction has been resealed before and is leaking again, full replacement is the right call. Applying sealant over a flashing that has a more fundamental problem provides a short-term result. We assess this during the inspection and recommend accordingly.

Yes. Penetration flashings around skylights, roof vents, exhaust outlets, whirlybirds, and solar panel rail mounts are among the most common flashing failures we repair. The approach depends on what has failed: a sealant-only failure can be addressed with a reseal, while a flashing that was never correctly installed or has corroded through needs replacement. We assess the penetration condition during the inspection and confirm the appropriate repair method before quoting.

An apron flashing seals the lower horizontal junction where a roof surface meets a wall, catching water flowing down both the roof and the wall and directing it away from the junction. A stepped flashing seals the inclined junction where a roof slopes upward alongside a wall, stepping with the wall coursing to intercept water at each course level. Apron flashings are used at the base of a wall junction. Stepped flashings are used along the side of a wall junction where the roof angle requires the flashing to follow the slope.

Yes. Ridge capping and barge capping replacement is a standard part of our flashing repair work. Both are prone to sealant failure, fixing movement, and in some cases corrosion, particularly on older roofs or in coastal environments. We reseal cappings where the metal is still sound and replace them where the metal has deteriorated or where the original installation was not to an adequate standard.

Minor flashing repairs such as resealing a penetration or a small apron flashing section can often be completed in a few hours on the same day as the inspection. Full flashing replacement at a complex junction, a valley replacement, or work involving multiple separate flashings across a larger roof area may take a full day or require a follow-up visit where fabricated flashings need to be prepared. We provide a realistic timeline in the written quote.

For multi-day jobs, we secure all open junctions at the end of each working day so the building is protected overnight. We plan schedules around forecast weather where possible and communicate early if conditions require a change to the plan. We do not leave any flashing junction open and unprotected at the end of a working day.

When the flashing failures are a symptom of widespread roof deterioration rather than isolated junction problems, continued repair investment delivers diminishing returns. If the same junctions keep failing, if the sheeting alongside the flashings is also corroded, or if the scope of flashing work needed across the roof is approaching the cost of re-roofing, replacement is the better long-term investment. We will make this assessment during the inspection and give you a comparison of both options if the situation calls for it.